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Scheelite and Tourmaline Optical Properties


Tourmaline and Scheelite Optical Properties


Optical Properties

Luster
Vitreous, Adamantine   
Vitreous   

Pleochroism
Definite dichoric in yellow (yellow to orange-brown)   
typically moderate to strong   

Dispersion
0.04   
12
0.02   
22

Transparency
Translucent, Transparent   
Transparent, Translucent, Transparent to opaque   

Refractive Index
1.918-1.936   
1.614-1.666   

Optic Character
Not Available   
Not Available   

Crystal System
tetragonal   
Trigonal   

Birefringence
0.016   
0.014-0.040   

Clarity
Translucent   
Transparent   

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Scheelite and Tourmaline Optic Character

Scheelite and Tourmaline optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Scheelite and Tourmaline Physical Properties like crystallographic symmetry, pleochroism,etc. in the crystal. Some of the optical properties are refractive index, luster, optic character, pleochroism etc. Prominent among these is Scheelite and Tourmaline optic character. You might have noticed your gemologist rotating the gemstone while testing it. Rotating a gemstone along its optic axis helps in determining its optic character.

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Scheelite and Tourmaline Transparency

Similar to their colors, Scheelite and Tourmaline transparency can also be used as criteria for their primary identification. Although transparency cannot be the only criteria for gemstone identification, it can efficiently used in gemstone grading. Talking about their transparency, Scheelite is Translucent and Transparent while Scheelite is Translucent and Transparent in appearance.

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Yellow Gemstones


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